JP4567946B2 - Suspension wastewater treatment apparatus and suspension wastewater treatment method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a suspended drainage for purifying suspended drainage generated in mud and muddy water flowing from dams, rivers, lakes, irrigation channels, etc. The present invention relates to a treatment apparatus and a suspension wastewater treatment method.
[0002]
[Prior art]
Conventionally, in order to purify suspended wastewater discharged from construction sites such as dams, rivers, and revetments for lakes, purification treatment is performed by combining a plurality of solid-liquid separators. For example, the following techniques are known for the purification treatment of such suspended wastewater.
Patent Document 1 discloses a storage tank for storing muddy water / muddy water, a flocculant charging means for adding a flocculant to the muddy water / muddy water, and a mixing device for mixing the flocculant with the muddy water / muddy water to generate a flock. And a turbid water / muddy water treatment device comprising a filtration device for separating the floc produced by the mixing device from water.
In Patent Document 2, an electrode plate group is formed by alternately arranging anode electrode plates and cathode electrode plates respectively connected to an anode and a cathode of a DC power supply along a water flow direction in a flow passage portion through which muddy water passes. A turbid water treatment device is described.
[0003]
[Patent Document 1]
JP 2002-219471 A
[0004]
[Patent Document 2]
JP-A-11-226577
[0005]
[Problems to be solved by the invention]
However, the above conventional technique has the following problems.
(B) The turbid water / muddy water treatment apparatus having the flocculant charging means described in Patent Document 1 adds flocculant such as polyaluminum chloride to the suspended waste water to agglomerate fine particles to form a floc. There is a problem that it is difficult to adjust the input amount and the like, and the cost of the medicine is low, and it is difficult to adjust the amount of the mixture, because it easily diffuses and pollutes the surrounding environment.
(B) The filtration device that separates floc and water consists of a porous material, and the solid content adheres to the surface of the mesh body with the treatment of turbid water, so the filtration efficiency of turbid water gradually decreases. Therefore, there is a problem that mass processing becomes difficult.
(C) In the turbid water treatment apparatus that agglomerates particles using the electrode plate described in Patent Document 2, the configuration for separating the solid content from the agglomerated treatment liquid is not presented, so the amount of turbid water flowing through the electrode plate, etc. There is a problem that it is difficult to adjust appropriately in conjunction with the filtration device, and the workability of muddy water treatment is lacking.
(D) There is a problem that aluminum ions are discharged while being combined with fine suspended particles and bioconcentrated to edible organisms at the discharge destination, which harms safety.
[0006]
The present invention has been made to solve the above-mentioned problems, and there is no risk of environmental pollution due to the use of a flocculant, and there is no clogging of filter cloth and the like, and a constant filtration process can be performed at all times. Suspension wastewater treatment equipment that can efficiently treat suspended wastewater by linking the amount of turbid water flowing through the filter with a filtration device, and suspension that can continuously and efficiently perform mass treatment of suspension wastewater An object is to provide a muddy wastewater treatment method.
[0007]
[Means for Solving the Problems]
  The suspended waste water treatment apparatus according to claim 1 is:In the gap formed by arranging the anode and cathode plates in parallelSuspended wastewater containing solids such as earth and sand is suppliedA suspension particle aggregation tank provided with a suspension particle aggregation part provided with an aggregation channel, and a filtration tank arranged in series via a partition wall on the downstream side of the suspension particle aggregation tank.Treated water tank and the treated water tankOf the filtration tankA filtration part comprising a bag-like filter formed in a sealed manner, wherein the suspended waste water is supplied from the outer surface side and the treated water filtered from the inner back side is discharged from the outer surface side, and the filter And a brush drive part that reciprocally slides the brush part along the surface of the filter, and the filter is formed in a bag shape. The whole is formed into a frame shape with a taro cloth and a pipe.A core material having a three-dimensional network structure is arranged inside the frame.A support frame incorporated in the filter cloth and communicated with a hollow portion of the support frameIn the lower side of the filter,Attached to the outside of the filter cloth.Supply compressed air and pressurized water to drain the filtrate in the filter and backwash the filter clothA water passage hole, and a plurality of water intake holes formed in one or more rows penetrating through the pipes of the support frame body and formed inward of the frame of the support frame body. Yes.
  This configuration has the following effects.
(1) Since the brush portion arranged with its bristles coming into contact with the outer surface of the filter formed in a bag shape is slid back and forth along the outer surface of the filter, the solid content on the filter surface is reduced. Removes the adhering layer and maintains constant filtration conditions without clogging, maintaining the stability of filtration efficiency over time and significantly reducing the number of maintenance due to clogging of the filter. Workability can be improved.
(2) The surface of the filter is swept by brushing at a predetermined interval with the brush part, and can be used in a state in which a certain amount of solid content is held inside the filter layer and the original mesh interval of the filter is narrowed. Capturing without allowing the particles to permeate.
(3) Since it has a brush drive section for reciprocatingly sliding the brush section, the adhesion layer can be uniformly and reliably compared to conventional methods for removing the adhesion layer by blowing air onto the filter surface or applying vibration to the filter. Can be removed.
(4) Since the bristles of the brush part are slid back and forth while being worn along the outer surface of the filter, the filter surface is not damaged and is excellent in maintainability and durability.
(5) Since the brush part is slid back and forth along the outer surface of the filter while rubbing the surface, the adhering layer of the solid matter adhering to the filter surface can be removed, and appropriate natural filtration conditions can be always stably maintained. Thus, the efficiency and stability of the processing work can be improved.
(6) Since only the bristles of the brush part are brought into contact with each other, the filter layer can be used while maintaining a water-permeable state in which a certain amount of solid content is maintained, and even fine particles smaller than the interval of the filter mesh can be permeated. Can be captured without any problem.
(7) Since it has a brush drive part that reciprocates the brush part, it is possible to remove the adherent layer reliably compared to the conventional methods for removing the adherent layer by blowing air on the filter surface or applying vibration to the filter. Excellent workability and maintenance.
(8) Since the filter is formed in a bag shape and the suspended water flows from the outer surface side to the inner back surface side of the bag-shaped filter, the solid content adhering to the outer portion of the filter should be covered with a brush or a rubber hose. Can be easily removed.
(9) Since it is easy to remove the adhering layer adhering to the filter and maintain the filtration conditions constant, the processing efficiency is improved, and a large amount of suspension containing a large amount of sediment particles in river works, etc. It becomes possible to treat waste water efficiently.
(10) Since the filter has a bag shape, even when the space in the treated water tank is narrow, the filter surface can be effectively utilized to efficiently process a large amount of suspended wastewater.
(11) Since there is no eluate as in a conventional water treatment apparatus using a flocculant, there is no possibility of polluting the environment along with the purification treatment.
(12) By applying a DC voltage between the anode plate and the cathode plate, the fine particles in the suspension drainage flowing through this aggregation channel are charged, and the suspension particles are promoted to flock, and the downstream filtration unit It can be grown to a predetermined size that can be captured by a filter, and the solid content in the electroprocessed suspended waste water can be reliably held on the filter of the filtration unit to be efficiently separated into a fresh water portion and a solid content.
(13) Since the filtration tank is arranged in series via the partition wall on the downstream side of the suspended particle agglomeration tank, the entire treated water tank can be made compact, and the apparatus is mounted on the loading platform of the truck and easily moved. Therefore, it is possible to easily treat suspended drainage generated when cutting a surface portion of asphalt or concrete road with a cutter.
(14) Since the suspended waste water floculated in the suspended particle agglomeration tank is supplied to the filtration tank arranged in series, there is little loss such as pressure loss due to the flow of the suspended waste water, and the entire purification efficiency Can be increased.
(15) A core material having a three-dimensional mesh structure can be arranged inside the water pipe so that the filter of the filtration unit is not crushed by external pressure, and the filter cloth is used for forced drainage using a pump or the like. However, it can be effectively prevented that the filter cloths of the front and back are in contact with each other by being recessed at the central portion to block the flow path and impede water permeability.
(16) The filter cloth can be back-washed by supplying compressed air from a compressor or the like to the water passage hole or by flowing pressurized water using purified water.
[0008]
  Here, the brush portion is formed in an elongated flat plate shape or a ring shape, and a fiber such as nylon, polyvinyl alcohol, polyester, etc. whose hair tips are opposed to the outer surface of the filter on one side of the flat plate shape or the cylindrical inner surface side. It is flocked. The brush portion is held via an elastic member such as a spring, and is arranged so that a predetermined pressing force is applied to the filter surface from the bristles. In addition to the flocked brush, a sheet or tubular material made of rubber or synthetic resin, or a thin plate made of metal or ceramic can be used as the brush portion. This is because it is possible to grind and remove the sludge adhering to the filter surface in the water of the filtration unit.
  The brush drive unit is configured to have a motor, limit switch, etc., using the motor as a drive source, the brush unit is moved against the filter surface, and the brush unit contacts the limit switch on one side to reverse the sliding direction. Thus, the filter surface can be slid back and forth at a predetermined interval.
  In addition to the electric motor, the brush drive unit can also use an air pressure or water pressure motor.
  When driving the brush part continuously, it is desirable that the brush reciprocated by the brush drive part is set so as to reciprocate once between the limit switches for 5 to 60 seconds, preferably 10 to 300 seconds. This depends on the type of wastewater drainage and its treatment amount, but as the reciprocating sliding interval becomes shorter than 10 seconds, the wear between the filter and the brush tends to become severe and the durability tends to decrease. On the contrary, as it becomes longer than 300 seconds, the average thickness of the adhering layer adhering to the filter surface becomes thicker, the pressure loss becomes large, and it tends to be difficult to maintain proper filtration conditions by natural filtration. The trend is shorter than 5 seconds or even greater after 300 seconds.
[0009]
The filtering unit has a predetermined mesh interval, for example, a bag-like filter made of a woven fabric or a non-woven fabric having a mesh interval of 0.001 to 1 mm, and a predetermined interval, for example, 10 to 200 mm. A large number are arranged in parallel at intervals.
The filtration unit is formed with a water or water pipe made of metal or plastic so that the whole has a frame shape, and a number of water intake holes are provided inside the water pipe, and the whole frame shaped water pipe is covered with a filter cloth. It can also be formed by covering the filter cloth and providing the filter cloth with a drain outlet for discharging the filtered water inside from the water pipe.
Furthermore, a core material having a three-dimensional network structure or a hollow structure can be disposed inside the frame of the water pipe so that the filter of the filtration unit is not crushed by external pressure.
Suspended drainage that differs depending on the level of the filter portion, etc. by gradually increasing the number of intake holes formed in the water pipe from the one side to the other side with respect to the center line of the water pipe. It is also possible to make the permeation suction amount uniform.
[0010]
In addition, the filtration part has a circular or square cylindrical water intake side end member provided with a water intake hole on one end side, and a circular or square cylindrical backwash side end member provided with a backwash pipe on the other end side. A filter cloth support member disposed at equal intervals so as to form a cylinder, a square tube or a star tube between the water intake side end member and the backwash side end member; and a cylindrical shape on the filter cloth support member Or it can also be comprised with the filter cloth covered in the shape of a square cylinder or a star-shaped cylinder. As a result, purified water filtered with a filter cloth can be obtained from the water intake hole of the filter member, and a backwash pipe is provided. Therefore, when the filter cloth is clogged, backwash air and filtered water can be removed. By flowing, the attached solid content can be easily peeled and removed. In addition, since a number of filter cloth support members have filter cloths that are covered in a cylindrical shape, a rectangular tube shape, or a star tube shape, the structural strength can be increased and the weight can be reduced, and the economy is excellent. When the filter cloth is formed in a star shape, the effective area at the time of filtration can be increased to increase the filtration efficiency, and it can cope with a large amount of processing.
[0011]
  Furthermore, in the filtration part,Carbon dioxide, etc.You may make it equip the tank bottom etc. with the fine bubble generator which generates the fine bubble mixed-solution ejector which supplies the water stream containing a fine bubble, and the fine bubble of carbon dioxide gas, and this makes alkaline water in a filtration water tank. Can be harmed to prevent harm from alkaline water.
  Here, the fine bubble mixed liquid ejector is, for example, a gas / liquid inlet having a hollow part formed in a substantially rotationally symmetric shape, and a gas / liquid introduction pipe that is opened in a tangential direction to the peripheral wall part of the container and is continuously provided. A configuration including a hole and a gas-liquid ejection hole provided so as to open in the direction of the rotational symmetry axis of the hollow portion can be applied. When water containing carbon dioxide gas or air bubbles is introduced into the gas-liquid introduction hole via a pump, the water flow flowing in from the tangential direction of the peripheral wall of the vessel swirls along the inner wall of the vessel, and this swirl motion The air bubbles in the water become fine bubbles, and gas-liquid mixed water containing fine bubbles of carbon dioxide and air can be discharged from the gas-liquid jet holes, and alkali components such as aluminum ions and calcium in the water can be discharged into the water. Dissolved CO₂Can be neutralized, the amount of dissolved oxygen can be increased, and water purification can be promoted.
[0012]
The filtration unit may include a shutoff valve disposed on the downstream side of the water intake unit of the filtration unit, and a backwash pipe communicated with the water intake unit on the upstream side of the shutoff valve. When the filter cloth is clogged with suspended solids, the shut-off valve located downstream of the water intake is closed, and compressed air or The backwashing operation can be performed by flowing pressurized water using purified water, etc., and the inside of the filter is expanded and compressed with compressed air or pressurized water, or the filter cloth is aerated with compressed air. The solid content layer adhering to the surface can be effectively peeled off and deposited and deposited on the bottom of the filtered water tank. Moreover, the shut-off valve can be operated to efficiently supply compressed air or pressurized water toward the filter cloth, and the solid content is peeled off, resulting in excellent maintainability and workability.
[0013]
The filter disposed in the filtration unit may be unitized by providing a partition frame that is detachably installed at predetermined intervals in the filtered water tank, and is damaged or deteriorated when the filter is attached. In this case, the filter can be exchanged reliably and easily, and the maintenance is excellent. Furthermore, the partition frame can prevent the filters from interfering with each other, and the filtration efficiency can be maintained.
Here, the distance between adjacent filter members is 5 to 20 cm, preferably 10 to 15 cm. Although depending on the concentration of suspended particles to be treated and the amount of treated water, the flow resistance of the suspended water flowing in the filtered water tank increases and the amount of filtered water tends to decrease as this interval becomes less than 10 cm. On the contrary, as the distance exceeds 15 cm, the surface area of the filter cloth disposed in the filtration water tank becomes insufficient, and the tendency to decrease the filtration efficiency appears. These tendencies become less than 5 cm or become more prominent when the distance exceeds 20 cm. Therefore, it is not preferable.
As the partition frame, one having a large number of openings is used so that flowing water made of metal or synthetic resin flows. Further, the partition frame and the filter are arranged so as to be separated from the bottom part and to store the suspension on the bottom part side. Thereby, the efficiency of flowing down the backwashed suspension to the bottom can be increased.
[0014]
The filtration section is also formed by a slanted water storage tank formed through a filtration water tank containing a filter and a suspension water partition wall, and a slant such that the water intake side is lowered at the bottom of the filtration water tank and the suspension water storage tank. You may make it provide the sludge collection wall which was made, and the sludge discharge part which discharges the sludge accumulated in the lower part at the intake side of a filtration water tank and a suspension water storage tank and collected on the sludge accumulation wall upper surface. Thereby, large particles such as earth and sand in the suspended water supplied to the suspended water storage tank and filtered in the filtered water tank can be precipitated and removed in advance, and the load on the filter cloth can be reduced. Furthermore, since it has the sludge accumulation wall formed in the bottom part inclined, solid content, such as earth and sand, can be removed from a sludge discharge part, without requiring special power.
[0015]
Furthermore, if necessary, the bag-like filter can be built with a frame made of vinyl chloride pipes to support the filter, or both ends of the filter can be fixed to the side of the water tank. For example, the distance between adjacent filters can be made appropriate and the shape can be maintained. As a material of the filter, a woven fabric or a nonwoven fabric made of synthetic fiber or natural fiber can be applied. Synthetic fibers that can be used generally include polyamides, polyesters, polyolefins, polyvinyl alcohols, polyfluoroethylene, polyacrylonitrile, vinyl acetate, and ethylene tetrafluoride having a thickness of about 0.1 to 20 μm. It should be noted that a predetermined portion of each intersection of the fibers is fixed by fusing by heating or adhering with an adhesive to reinforce the whole and trapping according to the size of solid particles in the suspended water The rate may be adjusted. In addition, the filter material is made of an ion exchange resin that prevents the adhesion of charged solid particles in suspension water, or the filter surface is partially covered with an ion exchange resin to suppress the adhesion of solid particles. It is also possible to prevent clogging during the filtration process.
Examples of ion exchange resins include cation exchange resins composed of polymer acids in which acidic groups such as phenolic hydroxyl groups, carboxyl groups, and sulfonic acid groups are bonded to matrix synthetic resins such as polystyrene cross-linked with divinylbenzene, and matrix synthetic resins. An anion exchange resin comprising a polymer base having a basic group such as an amino group, an imino group or an ammonium group bonded thereto can be selected and used according to the positive and negative charged state of the solid content. For example, when the solid content in the suspension water is positively charged, the filter can be coated with a cation exchange resin to effectively prevent the solid content from entering the filter cloth and the adhesion thereof.
It should be noted that the voltage applied between the electrodes of the suspended particle agglomeration part and the supply flow rate of the suspended drainage supplied to this agglomeration flow path depend on the mesh interval of the filter in the filtration part, the area of the filter, the pressure loss of the filter, etc. Accordingly, an appropriate value is set experimentally. Thereby, the processing liquid of the suspended waste water supplied to the filtration unit is flocked, and particles aggregated and flocked to a predetermined size can be reliably captured on the filter surface and separated into fresh water.
[0017]
  Here, the anode plate and the cathode plate of the suspended particle aggregating portion are flat electrodes made of a metal material such as aluminum, zinc / stainless steel, titanium, and steel, or a conductive material such as carbonaceous material. A plurality of these flat electrodes are alternately arranged in the water tank at predetermined intervals, for example, 1 to 100 mm, via non-conductive spacers or the like, thereby forming a suspended particle aggregation portion. Suspension wastewater is supplied to the gaps between these flat electrodes to form a coagulation channel, and a predetermined voltage, for example, a voltage of 0.5 to 100 volts is applied between the electrode plates to form fine particles in the suspension wastewater. To increase the cohesive force between the particles and promote flocking.
[0018]
  Claim 2The suspended wastewater treatment equipment described inClaim 1In the invention described in (1), the suspended particle aggregating tank is provided with an ascending channel and a descending channel for ascending and descending the suspended drainage upstream and / or downstream of the aggregation channel of the suspended particle aggregating part. A particle sedimentation section is provided.
  This configurationClaim 1In addition to the functions described in (1), the following functions are provided.
(1) Since a particle sedimentation section having an ascending channel and a descending channel is arranged upstream and / or downstream of the aggregation channel in the suspension particle aggregation tank, The flow is reversed in the vertical direction, and the solid content in the suspended waste water can be effectively precipitated and separated by the change in the flow.
(2) It is possible to improve the durability and maintainability of the entire apparatus by reducing the purification treatment of the suspended waste water in the subsequent aggregation flow path and filtration section.
(3) Since a particle sedimentation section that can settle suspended particles of a predetermined size without requiring a driving source such as electric power is provided, the purification treatment of suspended wastewater can be performed more economically.
  Here, the ascending channel and the descending channel are provided with a partition portion having a tip projecting upward or downward on the upstream side and / or downstream side of the aggregation channel for agglomerating fine particles in the suspended drainage electrically. The flow of the suspended drainage is reversed at the lower ends of the adjacent ascending channel and descending channel to precipitate the solid content in the suspended drainage.
[0019]
  When the suspension wastewater treatment apparatus is configured to have a suspension wastewater treatment tank in which a suspended particle aggregation part and a filtration part are arranged in series inside,Since the suspended particle agglomeration part and the filtration part are built in the suspension wastewater treatment tank, the whole can be made compact, and it can be easily moved by mounting the device on the truck bed part, Suspended drainage generated when the surface of an asphalt road in road construction is cut with a cutter can be easily treated.
  Also,Suspended wastewater that has been flocked at the suspended particle agglomeration section is supplied to the filtration section arranged in series, so there is little loss such as pressure loss due to the flow of the suspended wastewater, and the overall purification treatment efficiency is increased. Can do.
  Here, the suspension wastewater treatment tank is a box-shaped container formed of a material such as plastic or metal, and the suspension wastewater is supplied from an upper opening or the like via a pump or the like and arranged in parallel inside. The treatment liquid of the suspended waste water filtered from the inside of the filter can be discharged to the outside through a drain pipe or the like attached to the bag-like filter.
[0021]
  Claim 3The suspended wastewater treatment equipment described inClaim 1 or 2In the invention described inThe suspended particle agglomeration tank or the filtration tankIs provided with neutralizing means for neutralizing the alkaline suspended waste water.
  With this configuration,Claim 1 or 2In addition to the above actions, it has the following actions.
(1) Since the neutralization means is provided, it is possible to prevent the discharge destination such as a river from being alkalized by alkali ions.
(2) It is possible to prevent alkali accumulation of organisms such as rivers by alkali ions.
  Here, the neutralization means is performed by adding a neutralizing agent such as dilute hydrochloric acid or acetic acid or blowing carbon dioxide or the like into the suspended waste water.
[0022]
  Claim 4The suspended wastewater treatment equipment described inClaim 3In the invention described in (1), the neutralizing means includes an air diffuser and a carbon dioxide supply part for supplying carbon dioxide to the air diffuser, or a fine bubble mixed liquid ejector and the fine bubble mixed liquid ejected And a pump for supplying a mixed fluid of carbon dioxide and water to the vessel.
  With this configuration,Claim 3In addition to the above actions, it has the following actions.
(1) Since it has an air diffuser as a neutralization means, carbon dioxide gas or air is blown into the suspended waste water, neutralizing alkali components such as calcium hydroxide, and neutralizing the treated water, or increasing the amount of dissolved oxygen be able to.
(2) As a neutralization means, a pump for supplying a mixed fluid of carbon dioxide gas, air and water to the fine bubble mixed liquid ejector is provided, so that the alkali content can be neutralized and the amount of dissolved oxygen can be increased. In particular, since the fine bubble mixed liquid ejector has a strong ability to dissolve air in water, it is possible to neutralize the alkali content only with air.
[0023]
  Claim 5The suspension wastewater treatment method described inClaims 1 to 4A suspension wastewater treatment method using the suspension wastewater treatment apparatus according to any one of the above, wherein a suspension water supply step of supplying suspension wastewater containing solids such as earth and sand into the treated water tank, A filtration step of filtering the suspended drainage from the outer surface side to the inner back surface side of the bag-shaped filter disposed in the treatment water tank and hermetically sealed, and the hair tips are applied to the surface of the filter. And a brush process for reciprocatingly sliding the brush part in contact with the surface of the filter using the brush driving part.
  This configuration has the following effects.
(1) The suspension drainage is filtered with a bag-like filter placed in the treated water tank to which the suspension drainage is supplied.Filtration processAnd reciprocatingly slide the brush part along the surface of the filter via the brush drive part.Brush processTherefore, the solid content deposited and adhered to the filter surface can be reliably removed.
(2) Since the filter is always maintained in an appropriate filtration state, the suspended wastewater can be purified in a large amount and efficiently.
[0024]
  Claim 6The suspension wastewater treatment method described inClaim 5In the invention described in the above, a flocculation step of aggregating suspended particles in the suspension drainage in the flocculation channel in which the anode plate and the cathode plate are arranged in parallel is provided as a pre-step of the suspension water supply step. It is configured.
  With this configuration,Claim 5In addition to the above actions, it has the following actions.
(1) Since it has an agglomeration step for charging fine particles in the suspension drainage flowing through the agglomeration flow path, it promotes the flocculation of floating suspension particles and grows to a predetermined size that can be captured by the filter of the filtration unit, The solid content in the suspended waste water can be reliably retained on the filter of the filtration unit and can be efficiently separated into the fresh water portion and the solid content.
(2) Since there is no eluate as in the conventional water treatment method using a flocculant, there is no possibility of polluting the environment along with the purification treatment.
[0025]
  Claim 7The suspension wastewater treatment method described inClaim 5 or 6The filtration process or the aggregation process includes a neutralization process for neutralizing the alkali content of the suspended waste water or a dissolved oxygen enrichment process for increasing the amount of dissolved oxygen.
  With this configuration,Claim 5 or 6In addition to the above actions, it has the following actions.
(1) Even if the suspended waste water exhibits an alkalinity of pH 9 to 12, it can be neutralized to be neutral at pH 7.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
  (Embodiment 1)
  A suspended wastewater treatment apparatus according to Embodiment 1 of the present invention will be described.
  FIG. 1 is a perspective view of a suspended wastewater treatment apparatus according to Embodiment 1, and FIG. 2 is a schematic sectional view of the configuration.
  1 and 2, 10 is a suspension wastewater treatment apparatus according to the first embodiment, 11 is a suspension particle agglomeration tank in which suspension wastewater is supplied via a supply pipe 11a, and 11b is parallel with a predetermined interval. Suspended particle agglomeration section 11e having an anode plate and a cathode plate arranged side by side and an agglomeration channel between the anode plate and the cathode plate, 11e is a valve for opening and closing heavy particles such as earth and sand flowing into the suspended particle agglomeration tank 11. 11g is a coagulation tank tank bottom formed on the side wall at an angle of 3 ° to 45 °, and 12 is a suspension particle coagulation tank 11 for electrically aggregating fine particles in the liquid. Suspended wastewater is supplied through the connecting pipe 12a, the filtrate is discharged from the filtrate discharge pipe 12b, and the solid content filtered and separated is deposited on the bottom 12c of the tank, and the solid content discharge section 12d is passed through the on-off valve 12e. The filtration tank to be discharged, 12f is the valve of the filtrate discharge pipe 12b. , 13 and 14 have non-conductive spacers 11c suspended in the water tank of the suspended particle agglomeration tank 11 in parallel or perpendicular to the flowing water direction and fixed to the upper part of the suspended particle agglomeration tank 11. Anode plates and cathode plates alternately arranged in series via the electrode support 11d, 15 is a power source for applying a predetermined DC voltage to the anode plates 13 and 14 and 16 is a bag-like shape by a filter cloth 16a. The filter 16 is formed in a flat plate shape and has a support frame 16b inside, and is erected in the filtration tank 12, and the filter 16 is unitized by a filter unit (not shown).Filtration tank 12Is installed. 16c is a water passage hole that is provided in an opening in a filtrate discharge pipe 12b that is connected to the lower part of a plurality of filters 16 arranged in parallel in the filtration tank 12, and 17 is a filter through which the filtrate in the filter 16 is discharged. 16 is a brush portion with which the bristles of the brush 17a are brought into contact with each other on both surface sides, and 18 is a brush support that supports the left and right brush portions 17 so as to come into contact with both filter cloth surfaces of the filter 16. A brush drive unit 19 includes a sliding mechanism that reciprocally slides the brush support 18 up and down or right and left along the surface of the filter 16 at a predetermined speed.
[0027]
In the suspended particle agglomeration tank 11, anode plates 13 and cathode plates 14 made of brass, aluminum or the like in which the lower part is immersed are alternately arranged with a gap of 1 to 100 mm. Aggregation flow paths α through which the suspended drainage flows are formed in the gap between the anode plate 13 and the cathode plate 14 to which the DC voltage is applied, and the aggregation of fine particles in the suspended drainage is promoted. Thus, the aggregated particles are easily captured on the outer surface of the filter 16 in the filtration tank 12.
The anode plate 13 and the cathode plate 14 are connected and held by an electrode support 11d at the upper part thereof, and non-conductive spacers 11c made of plastic, ceramics, or the like are arranged between the electrode plates to maintain a predetermined interval and perform the cohesive flow. A path α is formed.
Here, each electrode plate is erected so as to be perpendicular to the suspended particle agglomeration tank 11, but each electrode plate may be inclined and formed to form an agglomeration flow path. In addition, each electrode plate can be provided with a large number of water passage holes, or the electrode plate can be formed of a wire mesh material so that the suspended drainage flows in the direction perpendicular to the electrode plate. A flow path α can be formed.
The bottom of the suspended particle agglomeration tank 11 is formed to be inclined, and the wastewater containing the precipitated solid content is appropriately discharged by opening the valve 11f from the agglomeration tank discharge part 11e.
The DC voltage applied to the anode plate 13 and the cathode plate 14 via the power supply unit 15 is 2 to 50 volts, preferably 6 to 24 volts.
This depends on the form of solids in the suspended wastewater, the electrical conductivity, the amount of treatment, and the like, but as the direct current voltage becomes lower than 6 volts, the agglomeration effect on the fine particles tends to decrease, and vice versa. When the voltage exceeds 24 volts, the electrolysis of the suspended drainage proceeds and the electrode wear tends to be accelerated. These tendencies become more prominent when the voltage is lower than 2 volts or higher than 50 volts.
[0028]
Next, the filter will be described with reference to the drawings.
3A is a perspective view of the filter according to Embodiment 1, FIG. 3B is a perspective view of the filter with the filter cloth removed, and FIG. 3C is arranged in the filter tank 12. It is a perspective view of the unitized filter made.
In FIG. 3, 16 is a filter for suspended water of the first embodiment, 16a is a filter cloth formed in a bag shape, 16b is a support frame formed in a substantially rectangular frame shape by a synthetic resin tubular product built in the filter cloth 16a. The body, 16c communicates with the hollow portion of the support frame 16b and is opened to the outside of the filter cloth 16a, and 16d is a filter cloth on both sides of the filter cloth 16a. 16e is a plurality of water intake holes that are drilled through the pipes of the support frame body 16b, and 16f is a metal wire disposed in the frame of the support frame body 16b. Or a core material formed in a three-dimensional network structure with a synthetic resin wire.
As shown in FIG. 3 (c), three filters 16 are grouped as a unit, and each water passage hole 16c is coupled in parallel via a three-branch pipe 16g. The base end of the three-branch pipe 16g is The filtration tank 12 is connected to the filtrate discharge pipe 12b. In addition, unitization is good also considering 2-5 sheets as 1 set.
As shown in FIG. 3B, the support frame 16b is configured as a substantially rectangular frame, and includes an upper intake pipe 16ba, a lower intake pipe 16bb, a rear intake pipe 16bc, and a front intake pipe 16bd. It is configured. A water passage hole 16c is provided at a position below the center of the front water intake pipe 16bd so as to protrude outward from the filter cloth 16a.
The intake holes 16e are formed in one or a plurality of rows toward the inside of the frame of the support frame 16b formed in a frame shape. The aperture is in the range of 1 to 5 mm, and the number of intake holes 16e in the support frame 16b is different for each intake pipe 16ba to 16bd. That is, when the arrangement number of the intake holes 16e per unit length in the intake pipes 16ba to 16bd is Na to Nd, the relationship is Nb> Nc = Nd> Na. Moreover, it is preferable to form so that the water intake hole 16e in the back part water intake pipe 16bc and the front part water intake pipe 16bd becomes so small that it goes upwards from the downward direction. This makes it possible to equalize the amount of air when the filter cloth 16a is back-washed by supplying compressed air from a compressor or the like to the water passage hole 16c, and to improve the removal efficiency of the solid matter adhering to the filter cloth 16a.
[0029]
The core material 16f is preferably made of a soft or hard synthetic resin such as polyethylene or polyamide, and is formed to have a three-dimensional network structure, so that the filter cloth 16a is centered at the time of forced drainage using a pump or the like. It can be effectively prevented that the filter cloths 16a on the front and back are in contact with each other and are blocked at the portion to block the flow path and impede water permeability.
The upper end of the filter 16 is suspended from the upper part of the filtration tank 12 and supported, or the filter 16 is erected via a support member (not shown) attached to the support frame body 16b or the filter 16 itself. They are fixedly arranged in the interior at a predetermined interval, for example, 30 to 150 mm.
The inside of each filter 16 is communicated with the filtrate discharge pipe 12b through a water passage hole 16c. The filtrate discharge pipe 12b may have a branch structure, and the branch portion may be connected to each filter 16 for use.
[0030]
The tank bottom 12c of the filter tank 12 holding the filters 16 arranged in parallel to each other is inclined in a single-side or V-shape at an angle of about 3 to 45 degrees with respect to the horizontal plane. A solid content discharge part 12d having a valve 12e and the like is arranged continuously at the lowermost part of the inclined part. By opening the valve 12e, the earth and sand deposited on the tank bottom 12c is discharged from the solid content discharger 12d.
[0031]
  The elongated brush portion 17Brush17 a is arranged so as to sandwich both sides of the substantially flat filter 16 via the brush support 18.
  4A is a plan view for explaining a drive mechanism of the brush drive unit for driving the brush unit, FIG. 4B is a side view of the main part, and FIG.Perspective viewIt is.
  4 and 5, reference numeral 19 denotes a brush drive unit that slides the brush unit 17 in the left-right direction, and the brush drive unit 19 is disposed at the lower inner side of the filtration tank 12.Brush drive support 12gIt is mounted and fixed on. Reference numeral 19a denotes a motor for driving the brush support 18 disposed on both sides of the filter 16 disposed in parallel via the chain 19b and the sprocket 19c. The brush 17a of the brush part 17 is driven along both surfaces of the filter 16 by the motor 19a of the brush drive part 19 through the chain 19b. The filter tank 12 and the chain 19b are provided with limit switches 19d and 19e at the up / down or left / right reversal positions of the brush part 17, whereby the forward / reverse rotation of the motor 19a is switched and the brush part 17 is slid back and forth. Is controlled.
  The brush support 18 may be driven by a brush drive unit having a back-and-forth motion mechanism such as a link mechanism that reciprocally slides in the vertical direction or the horizontal direction along the filter surface.
[0032]
A method for treating suspended wastewater using the suspension wastewater treatment apparatus 10 of Embodiment 1 configured as described above will be described.
Suspension drainage including mud water flowing from construction sites such as dams, rivers, lakes, and irrigation canals, and solids such as sediment generated during tunnel construction, river construction, dredging construction, construction work, and various construction works. The turbid waste water is supplied into the suspended particle aggregation tank 11.
The suspended waste water supplied to the suspended particle aggregation tank 11 flows through the aggregation flow path between the anode plate 13 and the cathode plate 14 to which a predetermined voltage is applied. Here, the microparticles in the liquid are charged to each other. Aggregates to form particles (floc) of a predetermined size.
Suspension wastewater containing particles electrolytically processed and flocked in the suspension particle aggregation tank 11 is supplied to the filtration tank 12 from the connecting pipe 12 a and filtered through the filter cloth 16 a of the filter 16. In this way, the solid matter deposited on the surface of the filter 16 and the filtrate are separated, and the filtrate is discharged from the water passage hole 16c below the filter 16 through the filtrate discharge pipe 12b. The solid content such as earth and sand which has been peeled off after adhering to is stored in the tank bottom 12c, and is discharged from the solid content discharger 12d as necessary.
During this time, the tips of the brush 17a of the brush portion 17 are brought into contact with both surfaces of the filter 16 and are slid back and forth at a predetermined speed using the brush drive portion 19, whereby the surface of the filter cloth 16a of the filter 16 is covered. The sludge is dropped and the filtration condition of the filter cloth 16a is maintained at an appropriate filtration condition that is always constant.
Thus, the suspension waste water can be continuously supplied to the suspension particle agglomeration tank 11 and the filtration tank 12 to efficiently perform the purification treatment of the suspension waste water containing the fine particles.
[0033]
  Since the suspended waste water treatment apparatus of Embodiment 1 is configured as described above, it has the following actions.
(1) The microparticles in the liquid can be charged in the suspended particle agglomeration tank 11 to promote the flocculation of floating suspended particles and can be captured by the filter 16 of the filtration tank 12 (5 to 5). 10 μm or more), and the solid content can be reliably held on the filter 16 of the filtration tank 12 to be efficiently separated into a fresh water portion and a solid content.
(2) Since the brush 17a of the brush portion 17 disposed so that the hair tip contacts the outer surface of the filter 16 formed in a bag shape is reciprocated along the outer surface, the solid on the surface of the filter 16 Therefore, it is possible to maintain a constant filtration condition at all times without clogging, and to improve the efficiency of the processing work.
(3) Since the surface of the filter cloth 16a is lightly brought into contact with the surface of the filter cloth 16a by the brush 17a of the brush portion 17, a certain amount of fine solid particles are held in the filter cloth 16a, and the original mesh interval of the filter is set. It can be used in a state of being narrowed by the solid content, and can be captured without allowing fine particles of about 0.1 to 5 μm to permeate.
(4) Since the suspended water flows from the outer surface side of the filter 16 formed in a bag shape to the inner back surface side, the solid content attached to the outer portion of the filter 16 can be easily removed.
(5) Since the brush portion 17 is provided, it is possible to easily remove the adhering layer adhered to the filter 16 in an aggregated state and maintain the filtration conditions constant, thereby improving the processing efficiency. It becomes possible to treat a large amount of suspended wastewater from dams and rivers.
(6) Since the filter 16 has a bag shape, even when the equipment space is narrow, the filter surface can be effectively utilized to efficiently treat the suspended waste water.
(7) Since there is no harmful eluate unlike the conventional water treatment apparatus using a flocculant, there is no possibility of polluting the environment along with the purification treatment.
(8) Since the brush drive unit 19 for reciprocatingly sliding the brush unit 17 is provided, it adheres more reliably than conventional methods for removing the adhering layer by blowing air on the filter surface, applying vibrations to the filter, backflow, etc. The layer can be removed.
(9)conventionallySuspended particles were removed by a chemical method, but since the present invention is a physical removal, minerals dissolved in water are discharged directly into rivers and dams as treated water. Growth can be promoted, and environmental conservation and improvement effects can be obtained.
[0034]
(Embodiment 2)
A suspended wastewater treatment apparatus according to Embodiment 2 of the present invention will be described.
FIG. 6 is a perspective view of the suspended waste water treatment apparatus of the second embodiment, and FIG. 7 is a schematic side sectional view thereof.
6 and 7, 20 is a suspension wastewater treatment apparatus according to the second embodiment, and 21 is an arrangement in which the suspended particle aggregation tank 11 and the filtration tank 12 having the same configuration as in the first embodiment are integrated and built together. The treated water tanks 22 and 23 are provided on the upstream side and the downstream side of the suspended particle agglomeration tank 11 and are provided with an upstream and downstream particle settling section having an ascending channel and a descending channel for ascending and descending the suspended drainage, 24 is a water storage tank for storing filtrate water flowing out from the filtrate discharge pipe 12b, 24a is a drain pipe for draining the filtrate water of the water storage tank 24 to a river or the like, 25 is a pump, and 25a is filtered water from the water storage tank 24 to the pump 25. , 26 is a gas supply part for supplying carbon dioxide gas to the suction side of the pump 25, 27 is a discharge pipe for discharging a mixed fluid of carbon dioxide gas and filtered water, and 28 is a hollow part formed in a substantially rotationally symmetric shape. Tangent to the body 28a and the peripheral wall of the body A fine bubble mixed liquid ejector provided with a gas liquid introduction hole having a gas liquid introduction pipe 28b continuously provided therein and a gas liquid ejection hole 28c provided in the direction of the rotational symmetry axis of the hollow portion. is there. When water containing carbon dioxide gas or air bubbles is introduced from the gas-liquid introduction pipe 28b of the fine bubble mixed liquid ejector 28 into the gas-liquid introduction hole via the pump 25, the water flow flowing in from the tangential direction of the peripheral wall of the vessel body is By swirling along the inner wall of the vessel body 28a, bubbles swirling in the water become fine bubbles by this swiveling motion, and gas-liquid mixed water containing fine bubbles of carbon dioxide and air is discharged from the gas-liquid ejection holes 28c. CO, in which alkaline components such as aluminum ions and calcium in water are dissolved in water₂Can be neutralized, the amount of dissolved oxygen can be increased, and water purification can be promoted.
In addition, in the following description, the same code | symbol is attached | subjected about what has the effect | action similar to Embodiment 1, and the description is abbreviate | omitted.
The upstream-side particle sedimentation part 22 is erected from an upper partition wall 22a that is suspended from the supply pipe 11a side to which suspended wastewater is supplied and whose lower end is opened and held, and a tank bottom 21a of the treated water tank 21, and its upper end. A lower partition 22b that is formed so that water can flow is provided on the lower side where the water is projected and held, and a descending channel and an ascending channel for ascending and descending the suspended drainage are formed between the partitions. The upstream particle sedimentation part 22 and the suspended particle agglomeration tank 11 of the treated water tank 21 and the bottom part of the downstream particle sedimentation part 23 are formed inclined, and the lower end side is formed with a hole or the like for discharging the precipitate. The discharge part 22c and the storage part are provided, and sediment can be taken out continuously or intermittently as needed. The discharge part 22c can also be provided independently for each of the upstream particle precipitation part 22, the suspended particle aggregation tank 11, and the downstream particle precipitation part 23.
The downstream particle settling portion 23 is formed with an upper partition wall 23a attached vertically or inclined between the suspended particle agglomeration tank 11 and the filtration tank 12, and a lower partition wall 23b with a flowing water section formed on the lower side. ing. Accordingly, the suspended waste water is taken in from the upper side of the suspended particle agglomeration tank 11 and is lowered to the tank bottom 21a side so as to be reversed upward, thereby preventing a short path of the suspended waste water flow. In addition, it is possible to efficiently perform the purification process, and it is possible to precipitate and remove particularly large solid content below the upper partition wall 23a.
[0035]
  Next, the electrode support structure will be described with reference to the drawings.
  FIG. 8 is a cross-sectional configuration diagram showing an electrode support structure in the suspended particle aggregation portion.
  In FIG. 8, reference numeral 30 denotes a water tank wall portion such as a treated water tank or an electrolytic water tank of the suspended particle agglomeration tank 11 in which suspended waste water is supplied from the upper side or the like via a supply pipe 11a, and 13, 14 are conductive materials such as aluminum. An anode plate and a cathode plate, which are formed in a substantially flat shape with a conductive material, and are arranged at predetermined intervals, respectively, 31 are electrically connected via conductive spacers 31a made of metal such as brass, and each electrode plate is connected Conductive support for holding, 32 is each electrode plate through a non-conductive spacer 32a made of a vinyl chloride pipe or the like13, 14A non-conductive support for supporting the substrate in an insulated state,33Is each electrode plate13, 14Are conducting wires for connecting to the power supply unit 15 respectively.
  The anode plate 13 and the cathode plate 14 are connected and held at the upper and lower parts and the middle part via the conductive support part 31 and the non-conductive support part 32 to maintain a predetermined interval, and an aggregation channel is formed between the electrode plates. I am doing so. For this reason, for example, when the suspended waste water is supplied from the supply pipe 11 a provided on the upper side of the water tank wall portion 30, the anode plate 13 and the cathode plate 14 supported by the conductive support portion 31 and the nonconductive support portion 32. In the coagulation flow path, extremely fine suspended particles can be aggregated and grown to particles of 5 μm or more, so that they can be precipitated and easily filtered and separated in the downstream filtration tank 12. . The suspended waste water subjected to the electrolytic treatment can be discharged from a discharge port or the like (not shown) provided on the side wall portion or the lower side of the water tank wall portion 30.
[0036]
  Since the suspended waste water treatment apparatus 20 of the second embodiment is configured as described above, it has the following actions in addition to the actions of the first embodiment.
(1) Since the particle sedimentation sections 22 and 23 are arranged on the upstream side and the downstream side of the suspended particle agglomeration tank 11, the flow of the supplied suspended waste water is reversed in the vertical direction, Solid content having a large specific gravity in the suspended waste water can be effectively precipitated and separated.
(2) Since the suspended particle aggregation tank 11 and the filtration tank 12 are built in the treated water tank 21, the whole can be made compact.
(3) Suspension waste water that has been flocked in the suspension particle agglomeration tank 11 can be directly supplied to the filtration tank 12, so there is little loss such as pressure loss due to the transfer of the suspension waste water, and economical efficiency during operation of the device Is also excellent.
(4) Since the upper partition walls 22a and 23a and the lower partition walls 22b and 23b are included, heavy specific gravity particles settle in the particle sedimentation sections 22 and 23. As a result, the durability and maintainability of the entire apparatus can be improved.
(5) Precipitating suspended particles of a predetermined size without the need for a driving source such as electric powerthingSince the particle sedimentation parts 22 and 23 that can be used are provided, the purification treatment of the suspended wastewater can be performed more economically.
(6) Since fine suspended particles are electrically agglomerated by energization of the electrode plate, clogging of the filter 16 in the filtration tank 12 can be prevented, and the operation time can be significantly increased.
[0037]
  (Embodiment 3)
  A suspended wastewater treatment apparatus according to Embodiment 3 of the present invention will be described.
  Figure 9The suspension waste water treatment apparatus of Embodiment 3It is a principal part perspective view of the filtration unit and brush part which are arrange | positioned at a filtration tank, and FIG. 10 is a perspective view of the modification of a brush part.9 and 1012b is a filtrate discharge pipe, 16 is a filter, 16c is a water passage hole, and 16d is a filter cloth fixing part. Since these are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted.
  In FIG. 9, 17 aa is a brush portion formed of stainless steel, wood, FRP, etc., which is attached to a brush rotating shaft 191 which is attached to a motor that is inverted within 90 ° via a coupling, etc. This is a brush formed of a synthetic resin sheet, a rubber tube or the like fixed to the brush portion 17aa. In addition, rotation is adjusted so that brush part 17aa and 17aa may rotate within 90 degrees by turns.
  In FIG. 10, 17ab is a brush portion formed of stainless steel or the like attached to a rotating shaft 192 that is attached to a motor via a coupling or the like, and 17cb is fixed to the brush portion 17ab with the same material as the brush 17ca. Brush. Brush portions 17aa and 17ab disposed between the filters 16 are provided with brushes 17ca and 17cb on both sides.
  As described above, since the brush portion of the third embodiment is configured, sludge on the surface of the filter 16 can be removed with a simple mechanism.
[0038]
【The invention's effect】
  According to the suspended waste water treatment apparatus of the first aspect, the following effects are obtained.
(1) Since the brush portion, which is arranged with its bristles coming into contact with the outer surface of the filter formed in a bag shape, is reciprocated along the outer surface of the filter, the solid adhesion layer on the filter surface is formed. It can be removed and kept at constant filtration conditions without clogging, maintaining the filtration efficiency over time and significantly reducing the number of maintenance due to filter clogging. Can be improved.
(2) The filter surface is swept at a predetermined interval by the brush part, and can be used in a state in which the filter has a solid content retained inside the filter layer and the original mesh interval of the filter is narrowed. You can capture without letting.
(3) Since it has a brush drive section that reciprocates the brush section, it is possible to reliably remove the adhesion layer as compared with the conventional adhesion layer removal method by blowing air on the filter surface or adding vibration of the filter. .
(4) Since the bristles of the brush part are reciprocally slid along the outer surface of the filter, the filter surface is not damaged and is excellent in maintainability and durability.
(5) Since the brush part is slid back and forth along the outer surface of the filter, the adhering layer of the solid matter adhering to the filter surface can be removed, and appropriate filtration conditions can be constantly maintained stably. Efficiency and stabilization of the processing work can be achieved.
(6) Since only the bristles of the brush part are brought into contact with each other, the filter layer can be used while maintaining a water-permeable state in which a certain amount of solid content is maintained, and even fine particles smaller than the interval of the filter mesh can be permeated. Can be captured without any problem.
(7) Since it has a brush drive part that reciprocates the brush part, it is possible to remove the adherent layer reliably compared to the conventional methods for removing the adherent layer by blowing air on the filter surface or applying vibration to the filter. Excellent workability and maintenance.
(8) Since the filter is formed in a bag shape and the suspended water flows from the outer surface side to the inner back surface side of the bag-like filter, the solid content attached to the outer portion of the filter can be easily removed. The filter has a long filtration time and excellent maintainability.
(9) Since it is easy to remove the adhering layer adhering to the filter and maintain the filtration conditions constant, the treatment efficiency is improved, and a large amount of suspended wastewater from river works is efficiently treated. It becomes possible to do.
(10) Since the filter has a bag shape, even when the space in the treated water tank is narrow, the filter surface can be effectively utilized to efficiently treat suspended wastewater.
(11) Since there is no eluate as in a conventional water treatment apparatus using a flocculant, there is no possibility of polluting the environment along with the purification treatment.
(12) By applying a DC voltage between the anode plate and the cathode plate, the fine particles in the suspension drainage flowing through this aggregation channel are charged to promote the flocculation of floating suspension particles, and downstream filtration is performed. Growing up to a predetermined size that can be captured by the tank filter, the solid content in the electroprocessed suspension drainage can be securely retained on the filter of the filtration tank and efficiently separated into a fresh water portion and a solid content. Excellent filterability.
(13) Since the filtration tank is arranged in series via the partition wall on the downstream side of the suspended particle agglomeration tank, the entire treated water tank can be made compact, and the apparatus is mounted on the loading platform of the truck and easily moved. Therefore, it is possible to easily treat suspended drainage generated when cutting a surface portion of asphalt or concrete road with a cutter.
(14) Since the suspended waste water floculated in the suspended particle agglomeration tank is supplied to the filtration tank arranged in series, there is little loss such as pressure loss due to the flow of the suspended waste water, and the entire purification efficiency Can be increased.
(15) A core material having a three-dimensional mesh structure can be arranged inside the water pipe so that the filter of the filtration unit is not crushed by external pressure, and the filter cloth is used for forced drainage using a pump or the like. However, it can be effectively prevented that the filter cloths of the front and back are in contact with each other by being recessed at the central portion to block the flow path and impede water permeability.
(16) The filter cloth can be back-washed by supplying compressed air from a compressor or the like to the water passage hole or by flowing pressurized water using purified water.
[0040]
  Claim 2According to the suspension wastewater treatment equipment described inClaim 1In addition to the effects of the invention described in (1), the following effects are obtained.
(1) Since a particle sedimentation section having an ascending channel and a descending channel is arranged on the upstream side and / or downstream side of the aggregation channel, the flow of the suspended waste water to be supplied is reversed in the vertical direction. By this change in flow, the solid content in the suspended waste water can be effectively precipitated and separated.
(2) The purification treatment of the suspended waste water in the subsequent aggregation flow path and filtration unit is reduced, and the entire apparatus is excellent in durability and maintainability.
(3) Precipitating suspended particles of a predetermined size without the need for a driving source such as electric powerthingSince the particle | grain precipitation part which can be formed is provided, the purification process of suspension waste_water | drain can be performed further economically.
[0043]
  Claim 3According to the suspension wastewater treatment equipment described inClaim 1 or 2In addition to the effects described above, the following effects are obtained.
(1) Since it has a neutralizing means, the discharge destination of a river or the like can be prevented from being alkalized by alkali ions, and is excellent in environmental resistance (such as prevention of river pollution).
(2) It is possible to prevent alkali accumulation of organisms such as rivers by alkali ions.
[0044]
  Claim 4According to the suspension wastewater treatment equipment described inClaim 3In addition to the effects described above, the following effects are obtained.
(1) Since it has a neutralizing means, it is possible to neutralize the alkali content and increase the amount of dissolved oxygen.
[0045]
  Claim 5According to the suspension waste water treatment method described in (1), the following effects are obtained.
(1) The suspension drainage is filtered with a bag-like filter placed in the treated water tank to which the suspension drainage is supplied.Filtration processAnd reciprocatingly slide the brush part along the surface of the filter via the brush drive part.Brush processTherefore, the solid content deposited and adhered to the filter surface is surely removed, the filtration time is prolonged, and the workability is excellent.
(2) Since the filter is always maintained in an appropriate filtration state, the suspended wastewater can be purified in a large amount and efficiently.
[0046]
  Claim 6According to the suspension wastewater treatment method described inClaim 5In addition to the effects described above, the following effects are obtained.
(1) Since it has an agglomeration step for charging fine particles in the suspension drainage flowing through the agglomeration flow path, it promotes the flocculation of floating suspension particles and grows to a predetermined size that can be captured by the filter of the filtration unit, The solid content in the suspended waste water can be reliably retained on the filter of the filtration unit and can be efficiently separated into the fresh water portion and the solid content.
(2) Since there is no eluate unlike the conventional water treatment method using a flocculant, environmental pollution can be prevented along with the purification treatment.
[0047]
  Claim 7According to the suspension wastewater treatment method described inClaim 5 or 6In addition to the effects described above, the following effects are obtained.
(1) Even if the suspended wastewater exhibits an alkaline pH of 9 to 12, it can be neutralized and neutralized to a pH of 7, and contamination of the discharge destination river or the like can be prevented.
[Brief description of the drawings]
FIG. 1 is a perspective view of a suspended wastewater treatment apparatus according to a first embodiment.
FIG. 2 is a schematic cross-sectional view of the suspended waste water treatment apparatus according to the first embodiment.
3A is a perspective view of the filter according to Embodiment 1. FIG.
  (B) The perspective view of the state which removed the filter cloth part of the filter
  (C) Perspective view of the filter unit arranged in the filtration unit
FIG. 4A is a side view illustrating a drive mechanism of a brush drive unit that drives the brush unit.
  (B) Plan view
[Fig.5] Brush drive unitPerspective view
FIG. 6 is a perspective view of the suspended waste water treatment apparatus according to the second embodiment.
FIG. 7 is a sectional view of the configuration of the suspended waste water treatment apparatus according to the second embodiment.
FIG. 8 is a cross-sectional configuration diagram showing a modified example of the electrode support structure in the suspended particle aggregation portion of the first and second embodiments
FIG. 9The suspension waste water treatment apparatus of Embodiment 3Perspective view of the essential parts of the filtration unit and brush unit installed in the filtration unit
FIG. 10 is a perspective view of a modified example of the brush portion.
[Explanation of symbols]
  10 Suspended wastewater treatment apparatus of Embodiment 1
  11 Suspended particle agglomeration tank
  11a Supply piping
  11b Suspended particle aggregation part
  11c spacer
  11d electrode support
  11e Coagulation tank discharge section
  11f valve
  11g Coagulation tank bottom
  12 Filtration tank
  12a Connecting pipe
  12b Filtrate discharge pipe
  12c tank bottom
  12d Solid content discharge unit
  12e Open / close valve
  12f valve
  12g Brush drive support
  13 Anode plate
  14 Cathode plate
  15 Power supply
  16 filters
  16a filter cloth
  16b Support frame
  16c water hole
  16d Filter cloth fixing part
  16e Water intake hole
  16f core material
  16g three branch pipe
  17, 17aa, 17ab Brush part
  17a, 17ca, 17cb brush
  18 Brush support
  19 Brush drive
  19a motor
  19b chain
  19c sprocket
  20 Suspended wastewater treatment apparatus of Embodiment 2
  21 Treated water tank
  21a Tank bottom
  22 Upstream particle sedimentation (particle sedimentation)
  22a Upper partition
  22b Lower partition
  22c Discharge part
  23 Downstream particle sedimentation part (particle sedimentation part)
  23a Upper bulkhead
  23b Lower partition
  24 water tank
  24a Drain pipe
  25 pump
  26 Gas supply section
  28 Fine bubble mixed liquid ejector
  30 Aquarium wall
  31  Conductive support
  31a  Conductive spacer
  32  Non-conductive support
  32a  Non-conductive spacer
  33  Conductor
  191 Rotating shaft
  192 Rotating shaft

Claims (7)

Suspended particle agglomeration tank provided with a suspended particle agglomeration section provided with an agglomeration flow path for supplying suspended drainage containing solids such as earth and sand to a gap formed by arranging an anode plate and a cathode plate in parallel And a treated water tank having a filtration tank arranged in series via a partition wall on the downstream side of the suspended particle agglomeration tank, and the suspended waste water is supplied from the outer surface side of the treated water tank. And a filter part provided with a bag-like filter that is hermetically sealed to discharge the treated water filtered from the inner back surface side, and a brush part that is arranged with its bristles in contact with the surface of the filter And a brush drive section for reciprocatingly sliding the brush section along the surface of the filter,
The filter is a filter cloth formed in a bag shape, a support frame body that is formed into a frame shape with pipes and a core material having a three-dimensional network structure inside the frame and is built in the filter cloth, Compressed air that communicates with the hollow portion of the support frame and is attached to the lower side of the filter so as to open to the outside of the filter cloth and for discharging the filtrate in the filter and backwashing the filter cloth. A water passage hole for supplying pressurized water, and a plurality of water intake holes formed in one row or a plurality of rows that are drilled through the pipes of the support frame and are formed inward of the frame of the support frame. Suspended wastewater treatment equipment characterized by that. The suspended particle agglomeration tank is formed with a particle sedimentation part provided with an ascending channel and a descending channel for ascending and descending the suspended drainage upstream and / or downstream of the aggregation channel of the suspended particle aggregating part. The suspended wastewater treatment apparatus according to claim 1 , wherein the suspension wastewater treatment apparatus is provided. The suspended particle agglomeration tank or the filter tank, the interior of any one or more of the treating tank, according to claim 1 or 2, characterized in that it comprises a neutralizing means for neutralizing the suspension drainage alkaline Suspension wastewater treatment equipment described in 1. The neutralizing means has an air diffuser and a carbon dioxide supply part for supplying carbon dioxide to the air diffuser, or a fine bubble mixed solution ejector and carbon dioxide and water in the fine bubble mixed solution ejector. The suspension wastewater treatment apparatus according to claim 3 , further comprising: a pump that supplies a fluid mixture with the suspension. A suspension wastewater treatment method using the suspension wastewater treatment apparatus according to any one of claims 1 to 4 , wherein suspension water containing solids such as earth and sand is supplied into the treatment water tank. On the surface of the filter, a turbid water supply step, a filtration step of filtering the suspended drainage from the outer surface side to the inner back surface side of the bag-like filter disposed in the treated water tank and hermetically sealed. A suspension drainage treatment method comprising: a brush step of reciprocally sliding along the surface of the filter using the brush drive portion with the brush portion in contact with the bristles. As a pre-process of the suspension water supply step, the method includes a coagulation step of aggregating suspended particles in the suspension drainage in the aggregation channel in which the anode plate and the cathode plate are arranged in parallel. The suspended waste water treatment method according to claim 5 . In the filtration step or the flocculation step, according to claim 5 or 6, characterized in that it comprises a dissolved oxygen enrichment step to increase the neutralization step or the amount of dissolved oxygen to neutralize the alkalinity of the suspension drainage Suspended wastewater treatment method.

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